Pause and play simulink in programming

Question

Pouya Jamali 2012-11-22

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https://ww2.mathworks.cn/matlabcentral/answers/54525-pause-and-play-simulink-in-programming

Is it possible to pause and play again Simulink block diagram through programming? For more clarification I have to say that I want to pause (not stop) my Simulink which is run with sim command in a script file. Is it possible and if so how?

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MatlabPro 2012-11-22

are you allowed to use a GUI?

Pouya Jamali 2012-11-22

No I just have to use programming commands!

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Answer 1

Kaustubha Govind 2012-11-26

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https://ww2.mathworks.cn/matlabcentral/answers/54525-pause-and-play-simulink-in-programming#answer_66545

在 MATLAB Online 中打开

See this page for information on using the SET_PARAM command to do what you need. In particular:

set_param('modename','SimulationCommand','start')
set_param('modename','SimulationCommand','pause')
set_param('modename','SimulationCommand','continue')
set_param('modename','SimulationCommand','stop')

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Pouya Jamali 2012-12-8

编辑：Pouya Jamali 2012-12-8

在 MATLAB Online 中打开

Of course here it is take a look please:

% Run Simulink Block Diagram Interactively
clear all; close all; clc;
Name='Suspended_Pouya_Biped';
% Simulation time
t0=0;
tstop=10;% Simulation Time
st=1;% Sample Time
N=floor(tstop/st); % The Number of steps
T_in=[0 0 0 0 40 0 0 0];% system input vector (From workspace)
ftime=t0+st;
flag=0;
for k=1:1:N
    switch flag
        case 0
            % set the pause time
            set_param([Name '/Pause/Constant'],'Value',num2str(ftime));
            sim(Name) % run the simulation
            Foot_R % system output vector (To workspace)
            flag=1;
        otherwise
            ftime=ftime+st;
            % set the pause time
            set_param([Name '/Pause/Constant'],'Value',num2str(ftime));
            %continue
            set_param(Name,'SimulationCommand','continue');
            Foot_R % system output vector (To workspace)
    end
end

During first loop matlab command window warns me about detecting assertion a lot of times. Thank you

Kaustubha Govind 2012-12-27

Sorry, I was away on vacation. Before you run the SIM command, could you run get_param(Name, 'StopTime') and make sure that the time returned is larger than the Pause block setting?

Pouya Jamali 2013-2-2

Ow thanks for your answer. I haven't got any notification email about your comment so I saw it really late. In order to answer your question I have to say yes, it is. It seems like a bug. If you agree with me please let me know how can I report it to mathworks respondents?

I've been struggling on interfacing programming environment and simulink block diagram for controller design objective but I haven't got a good solution. the only way which works properly is to run the simulink block diagram using sim command in each loop and export the system states. then use the last states as the initial states for the new time span and run it again by using sim command. this method is not satisfactory because the Initialization phase cause to rise run time. As I use the whole system in a objective function for a evolutionary optimization algorithm the run time is really important for me. It tooks for example 3 month to run the algorithm for small sample times like 0.005(s)(small sample times cause a lot of initialization). If I compass the Initialization phase the run time will be decreased to 3 days. Which is a significant value.

You are the only person who can help me Kaustubha. My master thesis has been stopped due to this problem. I would be more grateful if you communicate with me through email. Because this forum doesn't send notification email for comments.

Thanks in advance

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Answer 2

Nadir BOUTASSETA 2013-2-10

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https://ww2.mathworks.cn/matlabcentral/answers/54525-pause-and-play-simulink-in-programming#answer_74447

I think that the problem you are facing can be solved by using S-Functions such that at each iteration you change reference values and compute your cost function.